Injector



' K. o. STEFFNER.

INJECTOH.

APPLICATION FILED JUNE 22.v 1920.

1,362,052.' Patented De@.14,1920.4

UNITED STATES KARL OTTO STEFFNER, OF KARLAKOGA, SWEDEN.

INJECTOR.

Application led .Tune 22, 1920.

To all whom it may concern:

Be it known that I, KARL O'r'ro STEFFNER, a Swedish engineer, residing at Karlakoga, Sweden, have invented certain new and useful Improvements in Injectors, of which the following is a specification.

In order to facilitate the setting and removal of nozzles in ordinary injectors, the said nozzles are combined into a solid set secured in the injector casing. Sets of nozzles of this kind however can only forcibly be placed in their correct position and removed therefrom, especially in hot water iiijectors inside of which scale is formed which jams the nozzles.

According to this invention these disadvantages are entirely removed by loosely mounting the whole set of nozzles in the casing of the injector, so that the said set may be axially reciprocated between two end positions by means of any suitable handoperated actuating device arranged on theiiijec tor. A amming of the set of nozzles is precluded by frequently operating the said device so that the whole set of nozzles may j easily be withdrawn after the cover of the casing is removed. In order to render the manipulation of the said device independent of the attention of the attendants it is advantageous to connect this device positively to the injector-controlling members so that every time the injector is set in or out of operation the set of nozzles is axially moved between its two end positions without a separate operating handle being needed. The most suitable arrangement consists in opening or closing the injector-operating valves by means of the movable set of nozzles .shifted between its end positions. The said set of nozzles is thus reciprocated between two limiting points, one of the latter being adapted to cut off the live steam` and the other to cut ofi1 the pressure feed chamber from the overflow chamber. When one of the controlling members, for instance, the steam valve controlling the flow of steam to the nozzles, affords a free passage to the steam after the set of nozzles is shifted so that the water reaches the said nozzles, thev other controlling member is on its closing stroke and cuts off the pressure feed chamber from the overflow chamber, so that the water which was flowing to the latter through the pressure feed chamber while the set of nozzles was shifted, is now caused to flow to the boiler through the feed pipe.

Speccaton of Letters Patent.

Patented Dec. 14, 1920.

Serial No. 390,976.

Setting an injector to work by opening an outlet to the water coming from the pressure feed chamber is of course known in itself and may be considered as the best method for reliably starting injectors. T his is particularly suitable for injectors fitted with the vknown double nozzle arrangement intended for hot water feed. A disadvantage, however, lies in the fact that hitherto the flow of the water out of the pressure feed chamber was either effected by separately operating an outlet member by hand or by means of complicated mechanical transmission devices. The injector according to the invention has not these disadvantages, as the movable set of nozzles simultaneously opens the steam inlet and closes the flow ofwater from the pressure feed chamber without having to resort to separate devices. The set of nozzles which moves longitudinally between the two end position points used for cutting off water or steam, renders it possible to manufacture a simple and reliable hot water feed injector.

The drawing illustrates in longitudinal section an injector constructed in accordance with this invention. From this drawing it will be seen that the cylindrical inner wall of the casing, particularl the cylindrical portions c and f thereof, constitutes a guide in which the integral structure comprising steam nozzles a and b and the conibining nozzles c and d is slidably supported. The steam nozzles a and b are provided with external annular forwardly facing shoulders, the shoulder of nozzle b seating on the rearwardly facing internal annular shoulder at the rear of the casting which includes the nozzles c and d and the forwardly facing shoulder of nozzle a being seated on the rear end of the nozzle Z). A hollow block has threaded engagement with this casting in rear of the nozzles a and b and serves to clamp them in position. This hollow block is threaded for the reception of the threaded stem L which is rotatably locked against longitudinal movement by the annular plug member fw. The portion le of the stem L constitutes a valve controlling the flow of live steam from the chamber Z through the steam nozzles and this valve serves as an abutment limiting the rearward movement of the nozzles as the stem is rotated. The annular valve -n is adapted to seat on the valve seat m when the nozzles are moved forward and seat m constitutes therefore an abutment limiting this forward movement. When the stem it is rotated to advance the nozzles through a slight distance live steam flows to the overflow valve p through lateral openings 'o and aroundthewvalve n. If the. valve stem L is further rotated the valve la is moved farther olf its seat and the iiow of steam is increased so that water is sucked in and flows through the nozzle d to the pressure feed chamber Q from where it flows into the overow space and through the overflow valve 22. Vhen the stem it has been still further rotated to unseat the valve ,7c a lgreater distance and to seat the valve oz, the `iow of steam and water through the overliow valve is stopped, and the flow from the y pressure chamber Q into the boiler is started. Y

What I claim as Amy invention and desire to secure by Letters Patent is :-V

1.1In an injector the combination with a casing having steam and water inlets, of steam and combining` nozzles therein, said nozzles being connected and movable as a unit, and .means for jmoving said nozzles.

2. `In an injector the combination with a 'casing having steam and water inlets, of steam and combiningr nozzles therein, said nozzles being connected and movable Yas a unit, and an adjusting screw for moving said nozzles.

3. In an injector the combination with a casing having steam and water inlets and an overflow outlet, of steam and combining nozzles therein, said nozzles being connected `and movable as a unit, and carrying valve means Vfor controlling the overflow, and means for moving said nozzles.

4. In an injector the combination with a casing having steam and water inlets and an overflow outlet, of steam and combining nozzles therein, said nozzles being connected and movable as a unit, and carrying valve means for controlling the liow of steam and the overliow, and means for moving said nozzles. y

5. ln an injector the combination with a casing having steam and water inlets and an overflow outlet, of steam and combining nozzles therein, said nozzles being connected and movable as a unit, a screw device for moving said nozzles, Vsaid nozzles coperating with said screw device to control the flow of steam and coperating with the casing to control the overflow. Y

In testimony whereof I have signed my name to this specification inthe presence of two subscribing witnesses.

KARL oTTo STEFFNER,

Witnesses: K Y

HANS JoNnnRINs, ARNm INGERYD. 

